if   ch=='B'                                  : self.ToggleBackgroundColour(event)
            elif ch=='C'                                  : self.ChangeCommonChars     (event); return
            elif ch=='D' and len(Areas) > 1               : self.DeleteArea            (event); return
            elif ch=='F' and __debug__                    : self.Info                  (event); return
            elif ch=='I'                                  : self.ChangeImagesToScroll  (event); return
            elif ch=='J' and self.NUMBER_OF_IMAGES==1     : self.ChangeJustification   (event); return
            elif ch=='L'                                  : self.ToggleShowLabels      (event)
            elif ch=='M' and MaxNumberOfImages > 1        : self.ChangeNumberOfImages  (event)
            elif ch=='N' and CanZapImage                  : self.Rename                (event)
            elif ch=='R' and not(area.Dynamic|area.IsTour): self.ToggleRandom          (event,1)
            elif ch=='S'                                  : self.ToggleSets            (event,1)
            elif ch=='T'                                  : self.ChangeTimer           (event); return
            elif ch=='U' and not(area.Dynamic|area.Random): self.ToggleIsTour          (event,1)
            elif ch=='V' and OnAnImage                    : self.WindowsPhotoViewer    (event); return
            elif ch=='W'                                  : self.ToggleWrap            (event,1)
            elif ch=='Y' and not(area.Random|area.IsTour) : self.ToggleDynamic         (event,1)
            elif ch=='Z' and CanZapImage                  : self.Zap                   (event)
            elif ch=='A' and not(area.Dynamic|area.IsTour): self.ToggleRandom          (event,1)
                # Alt-R doesn't always work for some reason, so we give Alt-A as an alternative
            else:
                event.Skip()
            # Note:
            #  For keys that (normally) cause an immediate change with no user interaction (e.g. ToggleXXX),
            #    we do not do a 'return' here, so that area.ResumeTimer() will be called at the end of this function.
            #  For keys that cause user interaction (e.g. popping up a form),
            #    we 'return' here, so that the timer will not be restarted yet.